Convict Cichlids (Amatitlania nigrofasciata): Convict cichlids are known for their resilience and can hold their own against Oscar fish.
Firemouth Cichlids (Thorichthys meeki): Firemouth cichlids are relatively peaceful cichlids that can tolerate the aggression of Oscar fish.
Jack Dempsey Cichlids (Rocio octofasciata): Jack Dempsey cichlids are another cichlid species that can coexist with Oscars, provided they have enough space and hiding spots.
Silver Dollar Fish (Metynnis argenteus): Silver dollar fish are peaceful schooling fish that can add a dynamic element to the tank.
Plecostomus (Plecostomus species): Plecos are bottom-dwelling fish that can help keep the tank clean by eating algae and leftover food.
Bristlenose Plecos (Ancistrus species): Bristlenose plecos are a smaller species of plecos that are well-suited for tanks with Oscar fish.
Tinfoil Barbs (Barbonymus schwanenfeldii): Tinfoil barbs are large, active fish that can hold their own against Oscar fish.
Silver Arowana (Osteoglossum bicirrhosum): Silver arowanas are majestic fish that can coexist with Oscars in large tanks.